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Error code reference
Denso Air Conditioner Error Code E4
Activation of protective device: fan motor current is abnormal (higher than overcurrent relay's current setting value).
SourceDENSO Classic 40 - Full Service Manualp. 44
Diagnostic procedure
The full E4 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
See troubleshooting chart on page 47. To reset: hold down SET TEMP UP and DOWN buttons simultaneously for 3 seconds.
SourceDENSO Classic 40 - Full Service Manualp. 44
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
1 manual in the MyPros+ library documents this code for Denso air conditioner.
Models covered by the manuals that document this code
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